CRYSTENGCOMM
·
2022
·Vol. 24
·期 37
·6546-6557
·
IF 3.756
Quan Zhou,Xingjian Dai,Kailin Li,Chenzhi Zhang,Xinfang Zhang,Zhilan Du,Shuang Yi,Pingan Yang,Jinsong Rao,Yuxin Zhang
Manganese dioxide@NiFe layered double hydroxide@montmorillonite (MNFM) with a nanoflower-like two-dimensional layered core–shell construction has been successfully synthesized by a two-step hydrothermal method. The structural and compositional influences on its electromagnetic wave (EW) absorption characteristics were discussed. MNFM with 8 mm thickness displayed excellent performance, which showed a minimum reflection loss (RLmin) of −21.8 dB at 15.4 GHz and an effective absorption bandwidth of 4.6 GHz. Meanwhile, RLmin was −13.5 dB at 13. 5 GHz when the thickness was 2.8 mm, and the effective absorption bandwidth was 3.31 GHz. The improved EW absorption performance may be attributed to the multilayer core–shell heterostructure leading to multipole relaxations and the ternary composite with excellent impedance matching. Hence, this work introduces a new idea for constructing core–shell clay-based nanocomposites, which are a promising material for EW absorption.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2026
·
IF 8.6
Fazal Maula Khan,Muhammad Naveed Afridi,Muhammad Atif,Xingfen Chen,Peng Sun,Kai Wang,Yan Zhao,Zhishen Wu
Dual-stage nanoengineering significantly strengthens the BF/PLA interfacial bonding. • MXene/MMT grafting achieves a superior balance of strength and ductility. • Nanohybrid coating markedly improves mechanical, dynamic mechanical, and tribological properties. Basalt fiber (BF) reinforced PLA composites are limited by poor interfacial adhesion due to the chemically inert BF surface. This study addresses this challenge through a multi-stage surface nanoengineering strategy in which BF was first functionalized with silane (SBF), followed by the grafting of Ti 3 C 2 T x MXene and MMT nanoparticles using a polydopamine (PDA) mediator. The optimal fiber loading (5 wt%) was established using silane-treated BF, after which the synergistic effects of the nanoparticle coatings were evaluated. Comprehensive structural, thermal, and mechanical characterization demonstrated that PMSBF5 achieved a 10.26% increase in tensile strength and a 54.25% rise in elongation at break, while PMMSBF5 further enhanced ductility to 25.52% (171.20% improvement). PMMSBF5 also showed a 68.44% increase in flexural strength, a 116.53% rise in flexural modulus, and a 77.65% improvement in storage modulus. Tribological testing revealed a 5.76% reduction in COF and a 53.10% decrease in wear rate for PMMSBF5. These results confirm that PDA-mediated nanoengineering significantly improves interfacial stress transfer, positioning these composites as strong candidates for high-performance automotive and biomedical applications.
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2020
·
IF 5.162
Hongling Zhang,Jianzhe Ma,Fengyun Wang,Yuting Chu,Lei Yang,Mingzhu Xia
The carboxymethyl-chitosan-montmorillonite (CMC-MMT) organic-inorganic hybrid material was applied to adsorb Pb(II) and Congo red (CR) anionic dye from aqueous solution. Molecular dynamics(MD) simulation was carried out to reveal the mechanism of CMC hybrid MMT. The results suggested that CMC has been adsorbed on the interlayer space and surface of MMT, hydrogen bonds had been formed between hydroxyl & carboxyl groups of CMC with the surface of MMT, Van der Waals interaction was also existed, while amino groups of CMC hadn't obvious interaction with the surface of MMT. Batch experiments were executed to investigate the adsorption effect of CMC-MMT was compared with Na-MMT and CMC. The results showed that CMC-MMT exhibited the higher adsorption capacity than Na-MMT and CMC, The OH and COOH or NH 2 groups of CMC chains may serve as electrostatic interaction active sites and coordination sites, which improved the adsorption performance of CMC-MMT on Pb(II)，and the insertion of CMC enlarged the inter-layer space of MMT, resulting in more surface active sites in the CMC-MMT hybrid composite, which increased the adsorption of organic pollutant CR. The kinetic and isotherm studies indicated that the pseudo-second-order and the Langmuir model well described the adsorption equilibrium of Pb(II) and CR on CMC-MMT.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Tian Liu,Yun Zhang,Ze Wu,Chen-jing Zhao,Xi Dong,He-xin Gong,Bing Jin,Miao-miao Han,Jin-jia Wu,Yi-kai Fan,Nan Li,Ying-xia Xiong,Zi-qian Zhang,Zheng-qi Dong
The macrophage to myofibroblasts transition (MMT) has been reported as a newly key target in renal fibrosis. Lycium barbarum L. is a traditional Chinese medicine for improving renal function, in which its polysaccharides (LBPs) are the mainly active components. However, whether the role of LBPs in treating renal fibrosis is related to MMT process remain unclear. The purpose of this study was to explore the relationship between the regulating effect on MMT process and the anti-fibrotic effect of LBPs. Initially, small molecular weight LBPs fractions (LBP-S) were firstly isolated via Sephadex G-100 column. Then, the potent inhibitory effect of LBP-S on MMT process was revealed on bone marrow-derived macrophages (BMDM) model induced by TGF-β. Subsequently, the chemical structure of LBP-S was elucidated through monosaccharide, methylation and NMR spectrum analysis. In vivo biodistribution characteristics studies demonstrated that LBP-S exhibited effectively accumulation in kidney via intraperitoneal administration. Finally, LBP-S showed a satisfactory anti-renal fibrotic effect on unilateral ureteral obstruction operation (UUO) mice, which was significantly reduced following macrophage depletion. Overall, our findings indicated that LPB-S could alleviate renal fibrosis through regulating MMT process and providing new candidate agents for chronic kidney disease (CKD) related fibrosis treatment.
研究领域:
药理学
·
肾病学
·
分子生物学
·
中医药学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 35
·12092-12099
·
IF 7.059
Jian Liu,Weizhong Xu,Zhongwen Kuang,Pengli Dong,Youxing Yao,Huaping Wu,Aiping Liu,Fangmin Ye
Smart hydrogels play a vital role in fundamental research and industrial applications in the fields of biosensors, flexible devices and intelligent human–machine technologies; however, developing a simple, low-cost and large-scale method to obtain hydrogel actuators with rapid response and robust and steadily controllable motion remains a big challenge. In this work, a temperature-responsive, gradient structured hydrogel with quick bending and adjustable actuation was fabricated by the copolymerization of the N-isopropylacrylamide (NIPAM) monomer with dispersed montmorillonite (MMT) via a facile precipitation method. The introduction of MMT with good thermal conductivity made the volume phase transition of the PNIPAM-based hydrogel occur earlier, and the deformation degree and bending direction could be adjusted by changing the MMT content. The representative composite hydrogel with 0.2 g MMT in the precursor presented bidirectional bending characteristics with a bending amplitude of about 289° and an average bending speed of about 36.0° s−1, while the composite hydrogel with 0.3 g MMT in the precursor only possessed a unidirectional bending ability with a bending amplitude of about −259° and a bending velocity of about −28.8° s−1 due to the great difference in the shrinking capacity between the top and bottom sides of the composite hydrogel. In addition, flexibly controllable deformation was specially realized by a well-designed patterned hydrogel with a local component and a thickness difference. Our work provides a practical method for the ingenious design of a hydrogel for further development of programmable and versatile hydrogel-based smart actuators and soft robots.
研究领域:
材料科学
·
生物医学工程
·
软体机器人
·
智能材料
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2026
·
IF 5.2
Zhenyang Yin,Yitong Jiang,Fengyu Meng,Xiaoming Qi,Jiangsheng Chen,Hongbo Dai,Chen Qian,Yaqin Fu
Flexible polyurethane foam (FPUF) suffers from high flammability and environmental concerns, necessitating sustainable fire protection strategies. This work highlights a nacre-inspired, halogen-free flame-retardant coating with a hierarchical multicomponent “brick–mortar” architecture. Ammonium polyphosphate (APP) and sodium montmorillonite (MMT) act as rigid multiscale “bricks”, while Schiff base-modified chitosan (DCS) cross-linked with gelatin (GEL) forms the adhesive “mortar”, constructing a hydrogen-bonded, organic–inorganic hybrid network with robust interfacial compatibility on FPUF. The resulting FPUF/3A@M-D/G composite demonstrates remarkable fire safety, achieving a limiting oxygen index (LOI) of 32.6% and a UL-94 V-0 rating. Cone calorimetry shows significant reductions in pHRR1 (−46.1%) and pHRR2 (−67.7%), and THR (−16.8%), along with prolonged ignition time (from 4 to 6 s) and increased char yield (from 8.2 to 26.3 wt %). Meanwhile, the coating improves compressive strength (from 7.96 to 9.32 kPa) without compromising elasticity. Mechanistic analyses (SEM, FTIR, Raman, XPS, and Py-GC/MS) reveal a dual flame-retardant action of condensed-phase char reinforcement and gas-phase radical inhibition. This scalable bioinspired strategy provides a halogen-free pathway to simultaneously improve flame retardancy and mechanical robustness of FPUF for applications in transportation, furniture, and energy systems.
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Bingyao Zhou,Hong Wang,Shui Hu,Qi Yan,Pudun Zhang
Effects of montmorillonite (MMT) on the crystallization behavior of poly(L-lactic acid) (PLLA) were investigated by variable-temperature FTIR spectroscopy. The variations of carbonyl band (1800–1720 cm −1 ) of different PLLA/MMT nanocomposites were focused due to its strong intensity and the involved abundant structure information. Difference spectrometry was used to evaluate the structural variations of PLLA after introducing MMT, and perturbation correlation moving window two-dimensional analysis (PCMW2D) split the temperature range into two sub-regions, i.e., 32–116 ℃ and 116–152 ℃, on the basis of the spectral variation. Two-dimensional correlation spectroscopy (2DCOS) was further applied to such sub-regions in order to find the change order between varied PLLA polymorphs. The results showed that less addition of MMT (≤3%) would lead to a well-exfoliated structure, which not only had no nucleation effect for PLLA, but also delayed the cold crystallization to a higher temperature compared with the one of pure PLLA. However, a higher addition of MMT (≥5%) would lead to an intercalated structure, which acted as a nucleating agent and thus advanced the cold crystallization to a lower temperature. Nevertheless, the introduction of MMT cannot affect the phase transition order between the amorphous, the intermediate, the α′- and the α′-PLLAs based on 2DCOS results.
研究领域:
高分子科学
·
材料化学
·
光谱学
·
纳米复合材料
·
热分析
✓ 已验证
DOI
高影响因子
Minerals
·
2023
·Vol. 13
·期 4
·582
·
IF 2.5
Bao Guo,Xinlei Zhan,Kaixi Jiang,Hongzhen Xie,Rongdong Deng
Sedimentation of ultrafine silica particles that exist in acid leaching pulp and their separation from Pregnant Leach Solution largely determines the efficiency of a hydrometallurgical process utilizing copper oxide ore. Thickener on a larger scale can allow longer sedimentation, generating low overflow turbidity but high economic input. In this paper, the flocculation behavior of quartz particles in sulfuric acid solution using nonionic flocculants polyethylene oxide (PEO) and polyacrylamide (PAM), as well as ionic cofactor montmorillonite (MMT) and nonionic cofactor tannic acid (TA), were investigated, with the dynamic size of flocs and counts of fines being monitored using an in situ particle size measurement technique, namely the focused beam reflectance measurement (FBRM), under turbulent conditions. Attention was paid to variables affecting quartz flocculation properties from both physicochemical and hydrodynamic aspects such as shear intensity. The flocculation mechanism was investigated using zeta potential and dynamic light scattering measurements. It was found that the TA promotes the bridging flocculation of PEO-quartz by forming associative complexes with larger clusters in solution, while MMT electrostatically adsorbs on the quartz surface, enhancing its bridging with PAM. Low turbidity benefited from the higher shear resistance of the compact flocs structure provided by PEO/PEO + TA/PAM + MMT. Efficient solid–liquid separation was achieved by using the synergistic flocculation of small molecule cofactors and polymer flocculants.Keywords:acid leaching;thickening;quartz;flocculation
研究领域:
湿法冶金
·
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Xianliang Li,Yawei Shao,Zhihao Chen,Yanqiu Wang,Junyi Wang
In this study, a fluorescence and Fe 3+ ions-responsive cerium-based metal organic framework is decorated on phytic acid-glucose hydrothermal copolymer-coated montmorillonite (MMT@CP@Ce-MOF) nanocontainer, which was developed for Q235 carbon steel's corrosion protection and detection in solution, waterborne epoxy coatings (WEP), and solvent epoxy coatings (EP). In the solution phase, the corrosion detection ability of Q235 carbon steel was introduced, relying on the Fe 3+ ions-responsive characteristic of MMT@CP@Ce-MOF. In the coating phase, WEP and EP with good barrier effect, active anti-corrosion, self-detection, and good mechanical performance were fabricated by integrating MMT@CP@Ce-MOF nanocontainers. The EIS results indicated that 2D MMT@CP@Ce-MOF based composite coating showed better anti-corrosion performance (the |Z| f= 0.01Hz value of EP-MMT@CP@Ce-MOF and WEP-MMT@CP@Ce-MOF remained 1.33 × 10 9 Ω·cm 2 and 2.71 × 10 8 Ω·cm 2 , respectively, far higher than the bare coating) after 40 d immersion. At the same time, the Ce-MOF nanosensor could accurately reflect the occurrence of corrosion at the coating damage sites. Furthermore, high adhesion force (2–3 times higher than bare coating) and results of coating fracture surface showed that homogenously incorporated MMT@CP@Ce-MOF could improve the composite coating mechanical properties by chemical interaction with the epoxy polymer.
研究领域:
材料科学
·
腐蚀工程
·
纳米技术
·
表面工程
·
涂层技术
·
传感器
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）